Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 305

Monitor signal (digital) [A]
The status of the monitor signal (digital) can be obtained by using the I/O monitor and graph functions of MR Configurator2.
As for DI/DO in the table, DI indicates the monitor signal (digital) inputted to a servo amplifier; DO indicates the monitor signal
(digital) outputted from a servo amplifier.
The on/off status of DI is as follows:
• ON: Either the external input signal or input from the controller is on.
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5 MONITORING
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5.1 Explanation of monitor signals